Prism.languages.yaml = {
  'scalar': {
    pattern: /([\-:]\s*(?:![^\s]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\2[^\r\n]+)*)/,
    lookbehind: true,
    alias: 'string'
  },
  'comment': /#.*/,
  'key': {
    pattern: /(\s*(?:^|[:\-,[{\r\n?])[ \t]*(?:![^\s]+)?[ \t]*)[^\r\n{[\]},#\s]+?(?=\s*:\s)/,
    lookbehind: true,
    alias: 'atrule'
  },
  'directive': {
    pattern: /(^[ \t]*)%.+/m,
    lookbehind: true,
    alias: 'important'
  },
  'datetime': {
    pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:\d{4}-\d\d?-\d\d?(?:[tT]|[ \t]+)\d\d?:\d{2}:\d{2}(?:\.\d*)?[ \t]*(?:Z|[-+]\d\d?(?::\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(?::\d{2}(?:\.\d*)?)?)(?=[ \t]*(?:$|,|]|}))/m,
    lookbehind: true,
    alias: 'number'
  },
  'boolean': {
    pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:true|false)[ \t]*(?=$|,|]|})/im,
    lookbehind: true,
    alias: 'important'
  },
  'null': {
    pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:null|~)[ \t]*(?=$|,|]|})/im,
    lookbehind: true,
    alias: 'important'
  },
  'string': {
    pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)("|')(?:(?!\2)[^\\\r\n]|\\.)*\2(?=[ \t]*(?:$|,|]|}|\s*#))/m,
    lookbehind: true,
    greedy: true
  },
  'number': {
    pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)[+-]?(?:0x[\da-f]+|0o[0-7]+|(?:\d+\.?\d*|\.?\d+)(?:e[+-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,
    lookbehind: true
  },
  'tag': /![^\s]+/,
  'important': /[&*][\w]+/,
  'punctuation': /---|[:[\]{}\-,|>?]|\.\.\./
};

Prism.languages.yml = Prism.languages.yaml;